The heavy scalars in equation (REF ) have the time-dependent wave functions proportional to We use the notation from [1]} where \(t_{RG}\equiv t= \log {\Lambda \over \mu }\)  everywhere except in eqs. (REF )-(REF ) below, where \(t\)  denotes the normal time.
\(e^{i \sqrt{\vec{k}^2 +m^2_{\pm } } \, \, t} \ .\) 
